The Gulf of Taranto is a gulf of the Ionian Sea, in Southern Italy. Almost square, at 140 km long and wide, it is the largest gulf in Italy, in the far south-west of the Italian mainland. The Gulf is is delimited by the capes Santa Maria di Leuca and Colonna, encompassed by the three regions of Puglia (‘Apulia’), Basilicata and Calabria. See Taranto.